Transfer purchased ringtone from iPhone to iPhone?

I upgraded today from my 5s to a SE, and have already transferred all my apps, contacts, music, etc. But when I go into my settings to set the ringtone to the one I purchased through iTunes, it isn't there and it isn't listed in my purchases either. However, it's still listed in my purchases and tones on my old 5s, so I know I did buy it. How do I transfer it without buying it again?

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